北宋为金朝所驱,在江南偏安立国,定都(),史称南宋 ["北京","开封","杭州","南京"]
磨机产量为33t/h,出磨细度为394%,回料细度为53%,成品细度为52%,则回料量为()。 ["30","40","83t/h"]
准静止锋的特征是(). ["A.常在一个地区造成持续的阴雨天气","B.常造成强降水和梅雨天气","C.准静止锋中冷锋云系比较完整"]
全国兽药管理工作的主管部门是() ["国务院","农业部","中国兽药监察所","卫生部"]
LTE系统一共有()组SSS序列 ["3","12","128","168"]
线粒体DNA多态性